European or American in book title (4)
I believe the answer is:
finn
I believe this is a double definition.
'european' is the first definition.
(someone from Finland)
'american in book title' is the second definition.
(Huckleberry Finn in novels by Mark Twain)
'or' acts as a link.
(Other definitions for finn that I've seen before include "Eg, Helsinki native" , "hero of English or American novel" , "Scandinavian such as Sibelius" , "Native of Espoo" , "Someone from Helsinki?" .)